Artist, Dave Cole used a 22,000 lb vibratory compactor to drive a into a 2000 lb music box. The entire machine is capable of being moved through a single door, and was even installed in a second floor gallery. Here it is playing The Star Spangled Banner.
And here's a video of the entire construction:
Agreed, but at the same time... why the heck not?
It ain't "Mannheim" Steamroller, but there is something to be said for what you can do with retired road equipment.